No, the grille wasn't black. It is now.
I sanded it the best I could, sprayed a couple coats of flat black and then put a few coats of flat clear on. (spray can) I love it. Flat with almost a satin finish. The flat clear did a really good job of covering but not making it glossy.
As far as the spoiler I've been told the factory paint and clear will be so thick it'd be a huge pain to tackle. Soooo if that's true I guess I'm back to PlastiDip until I take the spoiler to a body shop.